低功耗单片机系统外中断扩展技术研究

A study on external interruptt extend technology of low power consumption single-chip′s system

介绍了在低功耗单片机系统中 ,充分发掘单片机内部资源的几种外中断扩展方法 ,同时提出了一种高性价比的二极管矩阵编码外中断扩展技术 .该技术仅占用三根 I/ O端口线 ,实现了 2 n -1个实时外中断扩展端口 .

This paper introduces sorts of external interrupt extend methods that exploit single chip′s internal resource on low power consumption ,and puts forward an external interrupt extend technology that with high performance price rate and based on diode mdtrix encode.The technology uses only three I/O pins,realizes 2\+n-1 realtime external interrupt extend ports.